For a rogue, I can't help but preach the benefits of padded cloth armor. Throw on a belted gambeson with half sleeves and a knee length hem for 8 easy points, 4 more for leather bracers and greaves, and you're sitting at 12 points of armor that's light and doesn't rattle or creak. Probably 18 after bonus if it's well made and looks medievalish.
Stud that cloth with metal rivets 1" on center and you could call it 20 before bonus, 26 max after.
Adding a helm would get more points quickly, but I personally don't like the way they mess with my hearing and peripheral vision.
Edit : Yeah, skip the greathelm. All of our system is based on verbal call and response, so wearing something that you can't hear clearly in is a bad call.